It isn’t just visitors who are causing problems at the Marina Abramovic in stallation on the sixth floor of the Museum of Modern Art. The artist has naked men and women — eight at a time, 38 in all — taking turns on dis play. A pair face one another at the entrance close enough that visitors brush against them on the way in. Another nudist is tied to a cross. It’s been reported that several visitors were asked to leave after touching the performers. But what wasn’t reported was that one of the naked men in the show had to be removed from the gallery because he became visibly aroused!